Definition of nosism in English:

nosism

noun

  • 1With reference to a group of people: a self-centred attitude, corresponding to egotism in an individual. rare before 20th cent.

  • 2With reference to an individual: the use of the word ‘we’ in stating his or her own opinions. rare.

Origin

Early 19th century; earliest use found in Blackwood's Magazine. From classical Latin nōs, 1st person plural pronoun + -ism, after egotism.